Design and simulation of a novel nano-plasmonic split-ring resonator filter

ABSTRACT

In this paper, a novel nano-plasmonic split-ring resonator filter is proposed and simulated. In this structure, split-ring resonator is situated between a T-shaped and a straight waveguide. Simulations are done based on Finite-Difference-Time Domain method. The filter is based on metal–insulator-metal (MIM) structure. Split-ring resonator, straight and T-shaped waveguides are consisted of air which are situated in a silver background. Effects of different structural parameters, such as the width of the straight waveguide, the distance between left waveguide and ring, T-shaped waveguide’s width and length and the split position on the transmission spectrum of the filter are being investigated. The proposed filter can confine light to sub-wavelength dimensions (of the order of nano-meter); therefore, it can be used in highly integrated optical circuits. Hence, by adjusting structural parameters, the best transmission peak value of 0.84 at 935 nm will be obtained which can be utilized in integrated optical communication systems.

KEYWORDS:

• MIM structure; nano-filter
• plasmonic
• split-ring resonator
• transmission spectrum

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Notes on contributors

Roozbeh Negahdari

Roozbeh Negahdari was born in Shiraz, Iran in 1988. He received BS degree from Technical and Vocational university of Tehran (Shahid Shamsipour University) in 2014, the MS degree in optoelectronic devices from Shiraz University of Technology (SUTech) in Iran in 2017. His research interests include contribution to the study of optical waveguides, plasmonic nano structures and photonic-integrated circuits.

Esmat Rafiee

Esmat Rafiee was born in Shiraz, Iran in 1988. She received a BS degree in electronic engineering from Kerman University in 2010 and an MS degree in optoelectronics (electronic) engineering from Shiraz University of Technology (SUTech) in 2013. She is currently a PhD student in optoelectronics (electronic) Engineering, in Shiraz University of Technology (SUTech), Shiraz, Iran. Her research interests include contribution to the study of ring resonators, nonlinear optical waveguides, plasmonic nano structures, photonic crystals and photonic-integrated circuits.

Farzin Emami

Farzin Emami was born in Shiraz, Iran in 1967. He received in BS degree in Electronic Engineering from Shiraz University in 1990, the MS and PhD degrees in laser optic from Khaje-Nasiredin Tousi and Tarbiyat Modares of Tehran-Iran in 1994 and 2002, respectively. From 2001 to 2003, he worked on semiconductor lasers simulations. In 2003, he was the Head of the Electronic Department of Electronic Industrial University of Shiraz, where he worked on a variety of optoelectronic devices including optical modulators, optical detectors, semiconductor optical amplifiers, Raman amplifiers, photonic crystals, neutron transmission doping, and organic light emitting diodes. In September 2004, he joined the faculty of Shiraz University of Technology (SUTech) in Iran. He is actively involved in optical telecommunication at the Opto-electronic Research Center of SUTech. At present, he is vice chancellor of academic affairs of SUTech.